Update xdg-shell proto.
Update xdg-shell proto.

yohanesu75/wlc,UIKit0/wlc,lkundrak/wlc,Enerccio/ewlc,vially/wlc,ammen99/wlc,ss1h2a3tw/wlc,gpyh/wlc,scarabeusiv/wlc,scarabeusiv/wlc,gpyh/wlc,SirCmpwn/wlc,ss1h2a3tw/wlc,SirCmpwn/wlc,vially/wlc,yohanesu75/wlc,Cloudef/wlc,Enerccio/ewlc,UIKit0/wlc,lkundrak/wlc,ammen99/wlc,Cloudef/wlc,Earnestly/wlc,Earnestly/wlc